Heating apparatus.



L. BOND.

' HEATING APPARATUS.

APPLICATION FILED JAN. 11, I916- l,224,061 Patented Apr. 24,1917.

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L. BOND.

HEATING APPARATUS.

APPLICATION FILED JAN. II. I916.

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1,22%,06 L Patented Apr. 24, 1917.

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, ing y e LEONARD BOND, OF GLOESOP, ENGLAND.

HEATING APPARATUS.

Original application filed May 23, 1914, Serial No. 840,491.

Specification of Letters Patent.

Patented Apr. 24, 1917.

Divided and this application filed January 11,

1916. Serial No. 71,547.

To all whom it may concern.

Be it known that I, LEONAPD BOND, a subject of the King of Great Britain, residing at Glossop, in the county of Derby, in the Kingdom of England, have invented certain new and useful Improvements in Heating" Apparatus, of which the following is a speclfication.

This invention has reference to heating apparatus applicable for warming the air in the interior of chambers or compartments where it is desired to maintain a uniform temperature notwithstanding the changes which occur in the surrounding atmosphere; such apparatus being especially designed for warming separate chambers or compartments requiring different temperatures or conditions of the atmosphere within them.

My heating apparatus isof the class in which hot water rises from the boiler into tubes, then follows the sinuous .course of the tubes, eventually discharging into the boiler again.

In known apparatus of this type, a convoluted heating pipe has been used, and it has been claimed that this pipe gives out a practically uniform heat throughout its entire length. I have found however that such is by no means the case in practice, because in a long length of convoluted pipe the water parts with its heat very rapidly, and the diiference between the temperature of the water at the point where it passes out of the boiler, and the point where it reenters it, is very marked. Now the present invention is primarily designed to enable the pipe to give out a more uniform degree of heat throughout its length than has been the case hitherto.

The invention will be understood from the following description reference being had to the accompanying drawings, in which Figure 1 is a perspective view of the heat- Fig. 2 is an elevation of my heating apparatus applied to a combined incubating and chicken raising apparatus of the type described and claimed in my application Serial No. 840491 of May 23rd, 1914:, of which this is a division.

Fig. 3, an end view thereof.

In these figures, 12 is the boiler or calorifere located outside the incubator and heated by a lamp or burner, the fumes from which are carried away by a small chimney 13 attached to the boiler. A pipe 14 from this boiler rises to the top of, and passes into the incubator 6. In order to enable the pipe to give a more nearly uniform degree of heat throughout its length, and thus insure that the heat shall be more uniform for the whole incubator, I arrange two pipes 15, 16, one within the boundary of the other and both following approximately the internal shape of the incubating chamber 6, (which in the drawing is shown rectangular). These are placed in a horizontal position at the top of the incubating chamber above the egg tray 7, and they are connected together by a short pipe 17. The pipe 14 from the boiler joins the inner of these two rectangular pipes at 18 and the flow of the water bifurcating at 18, flows in two streams around the chamber. The increase in bulk of the water by heating, helps it to bifurcate into two streams and aid circulation. The flow meeting again at, and passing through, the connecting pipe 17, flows in two streams through the outer of these pipes 16 back in the opposite direction around the chamber to the outlet pipes 19. The advantage of the arrangement is, that the water goes around the chamber in two streams, one stream making two half circuits, and the other stream two half circuits, and consequently the water does not have so far to travel because it is short circuited at 17. Hence the difi'erence of temperature of the water entering at 1 1 and passing away at 19 is less marked, than is the case with an ordinary coil, and yet the difference is enough to establish circulation.

The pipes 19 pass down to the top of the nursery chamber 3 where they join pipes 15 16 placed in a horizontal position inside the said chamber at the top, and arranged similar to the pipes 15 and 16, except that the hot water enters the outer of the two pipes first, and returns through the inner pipe back to the boiler through a pipe 20. It will thus be seen that the incubating chamber 6 takes the heat first and is kept at the uniform warmth which is so desirable for the successful incubation of the eggs, and then the nursery chamber 3 takes the heat afterward. In this chamber 3 the hot water also goes around in two streams, each making two half circuits. Consequently the water has only to pass through the two chambers 3 and 6 substantially the same distance it has hitherto had to pass through one chamber, when the ordinary convoluted coil was used. Hence only the same amount of heat is used to heat two chambers, as it has hitherto taken to heat one, with a coil of the convoluted pipe. It will thus be seen that the hot water circulating pipes are placed in horizontal tiers, 15, 16 and 15*, 16 one above the other, a pipe 15, 15 in each tier being respectively connected by flow and return pipes 14:, 20, with the boiler, while the other pipes 16, 16*, in the tiers are joined together by connecting pipes 19.

The boiler is kept filled against any leakage by a reserve tank 29, which is connected to the boiler by a pipe 30. 33 are exhaust pipes from the middle or highest point of the circuit, whose upper or open ends discharge into the tank 29. These form an automatic vent for steam, water or general overflow. 34; is a tap to enable the attendant to test the water level. A draw oft tap- 31 is provided for draining the water system, this tap being at the lowest point of the circuit.

The boiler 12 is by preference upright or vertical with a water space 35 at the sides (as Well as at the top) surrounding .the heating space 36. The return pipe 20 passes through or under the water space 35 to the center of the heating space 36, then by means of cross pipes joins the water space 35. In this way the water returning to the boiler is directly reheated by the flame in or below the heating space 35.

An important feature of the invention is this, that the water flows comparatively rapidly through the pipes 14, 17, 19 and 20, but less rapidly through the pipes 15, 16 and 15 16*. This is due to the pipes 17 19 and 20 acting as throttles, which retard the too rapid passage of hot water through the pipes 15, 16 and 15 16 and thus insure that the comparatively slow passage of hot water through these pipes shall radiate the required heat into the chambers. The pipes 15 and 16 in the chamber 6, are of rather larger size than the corresponding pipes 15, 16 in the chamber 3, so that the former will have a proportionally larger heat radiating surface than the latter. Hence when the heat given off by the pipes in the chamber 6, say 104, is such as to hatch the eggs, the heat given off by the pipes in the chamber below will be in the ratio required for the rearing of the chicks say 8085.

I declare that what I claim is 1. A thermo-siphon heating apparatus comprising in combination a plurality of concentrically arranged hot water circuit pipes following the internal shape of each chamber or compartment to which the apparatus is applied, and placed one within the boundary of the other; a short connecting pipe at one end of the apparatus for es tablishing communication between the circuit pipes; a boiler; a supply pipe from the boiler communicating with the inner circuit pipe at the other end of the apparatus; return pipes communicating with the outer of the said circuit pipes; a reserve tank, a pipe connecting the said tank with the boiler; and exhaust pipes connecting the top of the reserve tank with the highest point of the circuit pipes.

2. In a thermo-siphon heating apparatus, the combination with the chambers or compartments; of a plurality of concentrically arranged hot water circuit pipes arranged one within the boundary of the other and placed in horizontal tiers one above the other in the respective chambers; short connecting pipes for short-circuiting the pipes in each tier; a boiler; a supply pipe from the boiler communicating with the inner circuit pipe of the upper tier; return pipes joining the outer circuit pipe of the top tier to the outer circuit pipe of the lower tier; a return pipe for connecting the inner circuit pipe of the lower tier to the boiler; a reserve tank; a pipe connecting the said tank with the boiler; and exhaust pipes connecting the top of the reserve tank with the highest point of the circuit pipes.

3. In a thermo-siphon heating apparatus, the combination with the chambers or compartments; of a plurality of concentrically arranged hot water circuit pipes 15, 16, and 15 and 16*, arranged one within the boundary of the other, and. placed in horizontal tiers one above the other in the respective chambers, short circuiting pipes 17 joining the inner circuit pipe to the outer circuit pipe in each tier; a supply pipe 1 1 from the boiler communicating with the inner circuit pipe of the upper tier; return pipes 19 joining the outer circuit pipe of the upper tier to the outer circuit pipe of the lower tier; a pipe 20 joining the inner circuit pipe of the lower tier to the boiler, said pipes 17, 19 and 20 being smaller than the others so as to act as throttles; a reserve tank 29; a pipe 14- connecting the said tank with the boiler; and

exhaust pipes 33 connecting the top of the reserve tank with the highest point of the circuit pipes.

4. In a thermo-siphon heating apparatus for warming chambers and compartments, the combination with the respective chambers of a plurality of concentrically arranged hot water circuit pipes arranged one within the boundary of the'other and placed in horizontal tiers one above the other in the said chambers, the pipes of the upper tier being of rather larger size than the corresponding pipes of the lower tier so that the former will have a proportionally larger heat radiating surface than the latter; a flow pipe from the boiler communicating with the inner circuit pipe of the upper tier;

return pipes communicating with the outer signed my name this 9th day of January of the said circuit pipes in each tier; 2, re- 1915, in the presence of two subscribing witturn pipe connecting the inner circuit pipe nesses.

of the lower tier to the boiler; and connect LEONARD BOND.

ing pipes for short circuiting the pipes in Witnesses: each tier. G. O. DYMOND,

In witness whereof, I have hereunto M. HAILES.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, I). G. 

